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|.I MNHN! Wzlmeses h flu/LK ".PETERS PHOTO-LITHOGRAPHER, WASHINGTON, DJ)V @ni-teit tatts gutter 'Leners Patent No. 81,417, daad Aiguev 25, 1868,.

IMPROVEMENT IN PUMPS.

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TQ ALL WIIOM IT MAY .'CONCERN':

Be-it known thatI, JEHYLEMAN SHAw, of Bridgeport, in the county of Fairlield, and State of Connecticut,

have invented a new and improved Pump; .and I do hereby Adeclare that the following is'a full, clear, and exact vdescription thereof, which 'will ena-ble those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of thisspccitieation.

This invention consists in placing` two ordinary lift-pumps within a cylinder, provided at its lower end with a holding-valve, the piston-rods of the two pumps being connected by cords or chains passing overa pulley,

and all arranged in Vsuch a. manner that the device is made to operateasa force-pump, and elevate water or other fluid to any desired height,` according to theaniount of power applied to operate it.

In -the accompanying sheet oit-drawings i Figure 1 is a. vertical central section of my invention taken 4in the line x x, iig. 2.

Figure 2, a horizontal section of the same taken in 'the line yy, lig. 1.

Similar letters of reference indicate corresponding parts.

A. represents an external case, which may-heof cylindrical form, covered at the top, as shownat zi, and provided at its lower end'with a suction-pipe, B,- over the top of which a holding or retainingvalve,-G, is placed, as shown clenrlyvin iig. .1.

I This external case may beifo'rm'ed of two or more parts, connected by screw-joints, and divided by a. partition, aX, and within this cylinder .there areiittedV land rmlysecured two ordinary lifting-pumps, C CXX, provided respectively with the ordinary valvepistons b b', and piston-rods c e.`

' At the bottom of each pumplcylinder the usual holding-valves, d d', are placed.

The piston-rods of the two pumps are connected by two vcords or chains, e e', one of which, e', has its ends attached to the lower ends of the piston-rodsfand is fitted in a groove in a h xed pulley, D, over which it works,- the other oord orchain, e, having its ends-attached to the piston-rods considerably above the pistons, and working in-another groove in theA pulley D, nndcrwhich it passes.

This will be fully understood by referring tog. 1, and it will be seen that by thus constructing the .two pistons, they are madeV to operate simultaneously in reverse directions, one rising as the other descends, and owe verse.

The piston-rod c is tubular, and communicates with the` interior of its piston, b, and this piston-rod has an extension-pipe, E, attached, which passes up Vthrough the top, fa', of thecase, and has the power'attachedto it v by which the pump is operated.'

Thepistomrod c, ashort distance ahovc' theipiston, has openings, f, ma'de in it.

The operation isV as follows: I

A reciprocating motion is given the extensionpipe E, and the Vpistons vlib of the two pumps will move simultaneouslyin oppositedirections, and water be drawn up into thecylinder and through thetwo pumps, and discharged into the upper com'partmentof- A, whieh forms an hair-chamher, the walter being discharged from the upper end of the extension-pipe E. l i

The operation of the two pumps, in connection with the air-chamber, insures a continuous discharge of water, from E, thewater passing into Ethrough the openings f. V

It will be seen, of course, that the:water cannot risc' in the upper Vcompartment of the case A beyond a certain extent, as thevtirwlrieh'is contained therein .will prevent it.

By this arrangement, a very simple and eilicient foree-pump is ,obtaincd, and one which will operate perfeetly on a large'scale with but moderate expenditure of power; as there is but a smalll amount of friction to overcome'in the working parts. v' I i I claim as new, and desire to secureby Letters Patent The two lifting-punipaCXA CXX, fitted within the external case A, provided with a valve, C, at its'bottom,

t'and ell constructed andar-ranged to operate in the manner substantially as and for'the purpose herein set fortht JEHYLEMAN SHAW.

"Witnesses:

WM. F. McNAMARA, Aries.. F. Resnais. 

